mysql cluster installation: unstable output status with ndb_mgm show command

[Chung Tran Duc]

Hi,
Im configuring mysql cluster 7.5 on Centos 7.5. I have
1 management node
2 data node
2 sql node
I have an issue when running ndb_mgm show command on management node.

The first show
ndb_mgm> show
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 @192.168.100.101 (mysql-5.7.23 ndb-7.5.11, Nodegroup: 0, *)
id=3 @192.168.100.102 (mysql-5.7.23 ndb-7.5.11, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.100.100 (mysql-5.7.23 ndb-7.5.11)

[mysqld(API)] 2 node(s)
id=4 (not connected, accepting connect from 192.168.100.103)
id=5 @192.168.100.104 (mysql-5.7.23 ndb-7.5.11)

The next show command
ndb_mgm> show
Cluster Configuration
---------------------
[ndbd(NDB)] 2 node(s)
id=2 @192.168.100.101 (mysql-5.7.23 ndb-7.5.11, Nodegroup: 0, *)
id=3 @192.168.100.102 (mysql-5.7.23 ndb-7.5.11, Nodegroup: 0)

[ndb_mgmd(MGM)] 1 node(s)
id=1 @192.168.100.100 (mysql-5.7.23 ndb-7.5.11)

[mysqld(API)] 2 node(s)
id=4 @192.168.100.103 (mysql-5.7.23 ndb-7.5.11)
id=5 (not connected, accepting connect from 192.168.100.104)

and so on

id=4 (not connected, accepting connect from 192.168.100.103)
id=5 @192.168.100.104 (mysql-5.7.23 ndb-7.5.11)
...

Please tell me what I am wrong at?
Thanks